Commit 25d280aa authored Mar 25, 2013 by Jeff Layton Committed by Trond Myklebust Apr 05, 2013

nfs: allow the v4.1 callback thread to freeze



The v4.1 callback thread has set_freezable() at the top, but it doesn't
ever try to freeze within the loop. Have it call try_to_freeze() at the
top of the loop. If a freeze event occurs, recheck kthread_should_stop()
after thawing.

Reported-by: Yanchuan Nian <ycnian@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

parent 809b426c

fs/nfs/callback.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -125,6 +125,9 @@ nfs41_callback_svc(void *vrqstp)
		set_freezable();

		while (!kthread_should_stop()) {
		if (try_to_freeze())
		continue;

		prepare_to_wait(&serv->sv_cb_waitq, &wq, TASK_INTERRUPTIBLE);
		spin_lock_bh(&serv->sv_cb_lock);
		if (!list_empty(&serv->sv_cb_list)) {